Chore: Add Livechat repo into Monorepo packages (#25312)

packages/livechat/.storybook/mocks/uiKit.js

packages/livechat/.storybook/preview-head.html

packages/livechat/.storybook/preview.js

packages/livechat/.storybook/webpack.config.js

packages/livechat/.stylelintrc

packages/livechat/CHANGELOG.md

packages/livechat/LICENSE

packages/livechat/README.md

packages/livechat/babel.config.js

packages/livechat/package.json

packages/livechat/src/api.ts

packages/livechat/src/assets/favicon.ico

packages/livechat/src/components/Alert/index.js

packages/livechat/src/components/Alert/stories.js

packages/livechat/src/components/Alert/styles.scss

packages/livechat/src/components/App/App.js

packages/livechat/src/components/App/index.js

packages/livechat/src/components/Avatar/index.js

packages/livechat/src/components/Avatar/profile.png

packages/livechat/src/components/Avatar/stories.js